Perforated combustion-section



C. MUNZNER.

PERFORATED COMBUSTION SECTION.

1 APPLICATION EILED JAN. 10. l9l9. 1,333,563.

Patented Mar. 9,1920.

. CHARLES MUnziv R, OF CHICAGO, rumors, ASSIGNOR monivrnmciin STOVE COMPANY,

- I orgsr; LOUIS, MIssouR n CORPORATION on NEW JERSEY. i r.

V i FSEGTION.

To all whom it concern: 1 V

Be it known that I, CHARLEsMUNzNnR, a

. citizen of the Unitedv States, residing" at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Perforated Comtains "especially to the inner bustion sections, of which the following is specification, reference being had therein to the accompanyin 'drawing. V 5

This "invention "re ates to improvementsin perforated combustion "sections for oil stoves, and the. particular improvementperperforated tube of the combustion section. j

This improvement relates toawell-known type of perforated combustion section for oil stoves, which comprises inner and outer parallelperforated combustiontubes,'which have their lower ends seated: at opposite sides of the point where the vapor isgenerated, the generated vapor fiowingupward trough: which communicates: betweenfth'e. lower ends of the two tubes, the latter type of burner being commonly; known as the wickless? 1: 1 m.] My jp'resent; improve ment is dapted to be used with either the wick orrwicklesstype of burner, and the burner forms no part of my present inven tion. v I

Various formsof perforated. combustion sections. have been )proposed for use in burners of the "type to which my present invention pertains, but .in the practical commercial typeof combustion sections 'in use fora great many 1years,the inner outer tubes have practically universally been made of sheetmetal.

" It is well-known to those skilled inthis art that the inner combustion tube subjected to intense heat during the operation of the' burner'and becomes re'dhot, and that Application lin d Januany 10, 1919. Serial 270,538.

proved inner combustion tube.

' F 1g. 2 is ayvertical transverse central sec tlo'nal'view of a combust on sect1onembod'y thetemperature of the combustion section s lowest at their lowest ends and-gradually Specification of'Letters Patent. :Patentd.Ma -;9 11920 1 '1 increases to their upper ends. Owingtothe intense -heat to which the inner tube is su b]ected,'-j it is much shorter lived than the outer tube,ancllowingto the unequal tem-' perature' of the inner tube throughout its it to bulge and become uneven which unevenness seriously.interferes with the per 7 Various. constructions of inner tubes "l1ave, been' pro feet. combustionf of the" burner.

lengthpitsexpansion and contractioncauses posed to overcome the foregoing frailties of the sheet-metal inner tube,'but so far as Iain aware, none of them have been adopted to any serious extent and the plain sheetmetal inner perforated tube has been prac ti'cally; unlversally used in burners of this type. v v v V The primary object of my invention fis to construptthe inner tube of cast-iron, and

a further feature is the'particular construction of tlie inner tube of cast iron, whereby the connnercialf the foregoing' cited frailties and' defects of sheet metal inner tubes are overcome.

1 A further object of my presentimprove-h I ment' iscan improved combustion section made up of an inner cast-irontube and an outersheet-metal tube. In the RCCOIhPEtHyIIlg drawlngs:

Figure 1 is a perspective view'of n'yii'ning my present improvement.

Flg. 3 s a fragmentary nterior perspective view of one of the cast-iron. rings part of' my improved combustion forming tube.

in my improved combustion tube.

improvement, is madef'up'of a plurality of separate intermediate, rings 2 and 3,- a lower ring 4:, and a top'disk'f). All of these rings andftop are composed ofrcast-ironfThe Figl ft is a"fragmentaryexterior perspeclllYGVlGW ofone of the cast-iron rlngs used 0 rings 2 are narrower than the rings 3 aud t,

. V. a The f inner combustionsection 1, ofQiny notches 8, which extend thereinto to form passages extending fromthe inside to the outside of the tube'l.

The wider ring 3 is, also provided with the flanges .6 and 7, and with the notches 8 in one edge thereof, and in additionthis Evider ring has deeper and larger notches 9, through which metal rods 10 pass. These rods may pass also through the outer com bustionitubeall and the surrounding hood 12 serving to unite the inner and outer combustion sectlons and the hood 1n their 7 proper spaced relation,- as shown in Fig.

2, orthehood may be separately supported, but this forms no part of my present-invcm tion. i I

The lower ,ring 4 has a flange .6? at its upper edge, butfhasno flange at its lower edge '13. For illustrative purposes, the combustion section is 'here shown in com 'munication with the wick tube fond of burner, and the lower; ends of the lnner andouter tubes 1 and 11 are seated-between the flanged upper ends 14 of the wicl; tubes 1 5,,as clearly shown in Fig.7 2. t .7

The several parts comprising the inner cast-iron combustion section 1, are held clamped together bya plurality of longitudinally extending screw-threaded rods 16, here; shown to-be three in number. These rods pass through lugs 17, extending 'in- Iward fromithe. lower ring 4c and'are screwthreaded@into the top plate 5, as clearly shown, and by means of which the rings and top are firmly clamped together. p

As is welljkn'own to those skilled'in this art, 'thegperforations in the combustion tubes, bothinner andiouteig are out of line, tor-,in other words are staggered as-this is 'foun'dtobethe most eflicient arrangement to uniformly. mixed air with {the rising vapor between theinner and outer tubes. For the purpose of insurmgythe assembling of the rings'Q, 3 and {t in such positions that the adj acent slots or passages S'are out of line with each other, each of .these rings is pro vided with a'lug 18, and this lug enters one ofthe slots 8, ofthe adj acent ring. Thislug 118 .is located .in a verticalline' between the slots. 8,.as clearly shown in Fig. 3, sothatin assembling the rings, the lug. 18 is obliged to enter one. ofthe slots 8, andby reason of 7 its location insures that the notches :of the adjacent rings shall be out of line with each other.

Itlis also well-known to those skilledin .theart, that means is provided for lifting the combustion sectionsrtopermit access to the wicker wickless burner for lighting it,

and that Ythelifting means engages the inner combustion section, and. that this is generally 1 centrally arranged in theinner combustion section.

To provide for the usual lifting rod one of the: intermediate ringsZis provided with an inwardly extending spider 19,

number of diaphragms 21 integral It willbe observed that the which carries a centrally, upwardly projectingsQeketBO, adapted toireeeivethe lifting improved combustion section comprises an,

iiiner cast-iron tube and an outer sheetmetal tube. With this form of combustion section, the inner cast-iron .tube which is subjectfto 'these'vere heat will last longer than a sheet-metal tube, thus producing a combustion section much longer lived than one composed wholly of. sheet metal. In

the ordinary, sheet metal combustion section an ,inner :tube' is much shorterlived thanthe outer, tube, and when the innertube becomes defective, it must-bereplacedby a new one, or a complete new combustion V.

sectionprovided' V V fiange1nembers 6 constitute,: in eifect, a continuous flange, though, of course, the slots 8. cut up this flange into what might betermedflange members or a series of short flanges, while theflange 7, at the otheredge 1s contmuous. I prefer to form the rings with flange members 6 extending all around, because it t better servesto prevent, the lateral passage of air between the edges of therings and .does' not require an accurate fit of these edges, and forfthe same reason Iprefer to have theflange '7 extend all the way around the rings. Howeverfltwill be readilyunderstood that bymakinga substantially good fit betweenthe engaging edges of therings,

the members 6 and the flange 7 need'not extend throughout the peripheries ,of the rings, as. shown,,.and,jus t,a sufficient number of flangemembers. both edges of the ring, forzinstance, four in number, .would serve tocentralize the r ngs nto tubular --I"orm, and

the appended ;claims" are .to'; be considered as 1 covering suclrmodification. v e

For the purpose ofcheapness, I prefer to make an inner tubeof castiron, but :it .will

be. understoodiit could becoinposed of any other. suitable metal which would serve the purpose of durability, without departing i from the spirit. of my; present improvement. Havingithusidescribed,my invention,what

I claim "and desire tosecure by Letters Pat pentis; I V 1. A perforated. combustion section. of the (type described, having inner cast-metaltube made up of apluralityiofhorizontally arranged rings, eachring havingits opposite edges 7 provided with .upwardly and f downwardly extending flanges, one Iflange arranged at the inner sideofthering and the other flange at the outer side of the ring,

' LssapeafQ lstering transverse open ngs, jfor the purpose ClGSGllbBd. v Y

" 2. YA perforated combustion 'se'otion'of the type described, having an "inner cast-metal tube, composedg'of a. plurality of horizon-- tally arranged rings each having at V the inner side of'one edge a vertically arranged flange and atthe outer side ofthe other edge a verticallyarranged flange, whereby the rings are interlocked in tubular relation,

' assembled tubular relation.

inglnembers'for holding the rings in their 3. V A perforatedcombustion section ofthe type described, having an inner cast-metal tube composed ofa plurality of horizonof an adjacentring for the purpose detallyarranged rings having slots in one of their edges, and vertically arranged interlocking members for holding them in tubular form, one edge of the rings having a lug arranged out of Vertical alinement with its slots and adapted to engage one of the slots ing'mern'bers. for holding the rings in their tubular relation.

' 4:. A perforated combustion section of the type described, having an inner' cast n etal tube colnposedlof a plurality of horizontally versely arranged air-passages qsome of the rings having integral lnwardlc-ly extendlng aim-deflecting d laphragms' an long1tud1- jnally arrangedinieans for clamping the rings .in their tubular relation. i

one edge of the rings havingtrans'verse air-- passages and longitudinally arranged clamp- 5. A perforated combnstionsection"of the type .described, having an inner cast-metal tube composed of a plurality ofhoriz0narranged air-passages, a top plate,the lower 'iscribed,"-and longitudinally arranged clamparranged rings, each ring having. transtally arranged rings having transversely ring having inwardly extending lugs and longitudinally arranged clamping members passing through lugs and into the top for holding the parts in their assembled relations. I

In testimony whereof I hereuntoaffix my signature.

CHARLES. MUN'ZNER. 

